PROTON-595: Python Popen() failure on Windows Reviewed at https://reviews.apache.org/r/22273/ This patch incorporates both of astitcher's review comments.
PROTON-595: Python Popen() failure on Windows
Reviewed at https://reviews.apache.org/r/22273/
This patch incorporates both of astitcher's review comments.

git-svn-id: 33ed6c3feaacb64944efc691d1ae8e09b17f2bf9@1602290 13f79535-47bb-0310-9956-ffa450edef68

astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old,astitcher/qpid-proton-old